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COMMITMENTS AND CONTINGENCIES (Building Acquisition Commitments) (Details) $ in Thousands | 9 Months Ended
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Sep. 30, 2020 USD ($)
Office Space Purchase Commitment | Ukraine |
Other Commitments [Line Items] |
Total commitment amount | $ 36,900

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- Definition The minimum amount the entity agreed to spend under the long-term purchase commitment. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_StatementGeographicalAxis=country_UA
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |